 /* 左侧tab切换样式 */
.design_left_left {
    width: 100%;
    height: 660px;
    display: inline-block;
    /* background: pink; */
    overflow: hidden;
    overflow-y: scroll;
    
}

.design_left_left li {
    width: 100%;
    height: 80px;
    /* background: yellow; */
    margin-bottom: 10px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    /* line-height: 30px; */
}


.design_left_left li.active {
   border-left: solid 5px orange;
   color: orange;
}

/* 如果需要在第一个li有特殊样式，可以加这个 */
.design_left_left li:first-child.active {
    border-left: 5px solid #ffcc00; /* 示例：左侧边框高亮 */
}
.design_left_left i{
    font-size: 30px;
    margin-bottom: 5px;
}

.positioning{
    width: 85px;
    height: 80px;
  position: fixed;
  background: white;
  display: inline-block;
  bottom: 0;
  left: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
 padding-bottom: 5px;
}
.positioning i{
    font-size: 30px;
}